Reproducer attachment



A. T. TAYLOR REPRODUCER ATTACHMENT I Filed Dad. 14 v 25 mistres es; s,was j ALFRED '1. TAYLOP OF RICHMOND HILL, NEW YORK.

REPRODUCEB ATTACHMENT.

Application filed December 14, 1925. Serial No. 75.297.

This invention rclatesto reproducer attachments and more particularly toelectromagnetically operated reproducers.

lhe object of this invention is to provide a compact unit of simpleconstruction, which may be easily attached to an electromagnetic unit toform an electrical reproducer for disc phonograph records.

This object is attained by forming a cap member which carries a ferrulewhich is adapted to be attached to the tone arm of a phonograph. Astylus bar yieldingly supported within the cap member is provided with amovable member to adjust the airgap between the armature and the polepieces of the electromagnetic unit. A chamher on one side of thearmature contains damping material. This construction affords aninexpensive and efiicient attachment which is simple in structure andcan easily be manufactured.

Referring to the drawings Fig. 1 illustrates in cross-section thestructural features of this invention and Fig. Qis an enlarged view inelevation of the combination stylus bar and armature.

The reproducer attachment of this invention comprises a circular capmemberl, preferably of insulating material, such as hard rubber. Thismember may be moulded, and as shown, is provided with a concentricsocket 2 on one surface thereof, which carries a bushing 3, preferablyof soft rubher, to provide a yielding connection to the metallic tonearm 4 of a phonograph. An internal thread 5, on the cap member receivesthe electro-magnetic unit 6, shown in dotted lines.

The cap member 1 is provided with an aperture 7, through which thestylus bar 8 projects. The portion of stylus bar 8 which extends intothe cap member is preferably of semi-circular cross-section and taperedat one end, to provide strengthening means for the reed or armature 9.The armature 9 may be formed integral with the stylus bar, or if made ofdifferent material, the stylus bar may be welded or otherwise secured tothe armature. A metallic disc 10, of magnetic material, such as iron orsteel, is fastened to one surface of the armature coaxial with respectto the inner wall of the .cap member. This disc provides a large surfacearea for the armature 9 thereby reduc ing the size of the armature,which in accordance with this invention is a thin reed of metal.

The combination stylus bar and armature is supported within the cap?member 1, by means of a metallic bearing member comprising a pair ofmetal supporting blocks 11 which are rigidly attached to the cap mem herby screws 12, and ayielding bridge 13, of angular cross-section. whichis preferably welded to supporting blocks ii. The stylus bar andarmature is soldered or welded to the bridge 18 intermediate the endsthereof. This arrangement affords an ctlicient yieldable support for thestylus bar and prevents side play in the armature. A metallic bushing 14is moulded in the cap member at a right angle to the free end ofarmature 9. An adjusting screw 15 isthreaded in the bushing 1t andattached to the armature by means of a stud 16 which passes through thearmature and is threaded in the adjusting screw 15. This adjustmentprovides an easy means of varying the gap between the pole pieces of theelectro-magnetic unit 6 and the disc 10.

A concentric depression on the inner sur face of the cap member forms achamber for the damping means 17, which may consist of sponge rubber orother damping material, The damping means fills the chamber and is incontact with one surface of the armature 9 to absorb shock and thenatural fre quencies of the reed or armature 9. The end of the stylusbar 8, projecting from the cap member, is pro vided with a socket toreceive a phonograph needle 18 which is held in the socket by means of ascrew 19 The reproducer attachment may be readily connected to anycommercial headphone unit and the receiver cord connected to a vacuumtube amplifier to reproduce electrically the recordings on the record.

Although the invention has been disclosed with respect to a particulararrangement of parts, it is understood that various modifications may bemade in the structural senibly, without departing from the scope of lidnetic unit, a yielding member carried by said cap member, a stylus barattached to said yielding member, and means for damping said stylus bar.

2. A reproducer attachment comprising a cap member having a socketadapted to be attached to the tone arm of a phonograph, said memberhaving a threaded portion adapted to be connected to an electromagneticunit, a yielding member carried by s 'id cap member, a stylus barattached to yielding member, an armature carried said her, means on saidcap member to control the movement of said armature, and additionalmeans to dampen said armature. eproducerattachment according to n'z,said armature having a metallic Wtached thereto intermediate the endsreproducer attachment comprising an insulating cap member having aconcentric socket adapted to be attached to the tone arm of phonograph,said member having internally threaded portion adapted to be connectedto an electromagnetic unit, a

yieldable metal bearing surface carried with in said member, a stylusbar rigidly attached to said bearing, said bar being substantiallyWithin said cap member, and adjustable means extending through saidmember and attached to said stylus bar.

5. A rcproducer attachment comprising an apertured insulating cap memberhaving a socket adapted to be attached to the tone arm of a phonograph,said member having a threaded portion to be connected to anelectromagneticunit,. a yielding bearing member carried. Within said capmember, a stylus bar'attached to said bearing member, a portion of saidbar extending through said apertured cap member and another portionbeing Within said cap member, an adjusting screw attached to the freeend of said bar, and damping material held in said cap member by saidbar.

In witness whereof, I hereunto subscribe my name this 11th day ofDecember A. D. 1925.

ALFRED T. TAYLOR.

